Just because it should be highlighted every once in awhile - not that, unfortunately, we won't go over the same ground again and again. For those who want to argue otherwise, John Driscoll's meticulous comparison
of Daito-ryu and Aikido techniques - showing an almost one-to-one correspondence between the two, with the exception of aikido koshinage (which, in another column
, John almost surely establishes, is the single and only technique that Ueshiba derived from his earlier brief studies in Yagyu Shingan-ryu).
While agreeing with most of the above, I continue to assert that there is also evidence in Saotome's jo, particularly the piece sometimes referred to within his organization as the "pre-set," for a line of derivation from Yagyu Shingan-ryu for some of the aikijo attributed to Ueshiba. Timestamp 2:58-3:27 at this Youtube URL evidencing blatant copyright infringement
. I also note that the oral history associated with this set has always claimed its origins in bojutsu.
Compare with this example of Goto-ha Yagyu Shingan Ryu bojutsu
I am not asserting that the derivation as shown in the videos referenced above is point for point, clear, complete, or equivalent in rigor of execution. But the visual evidence of derivation remains compelling to my eye, notwithstanding the longstanding assertions of others to the contrary.